<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script type="text/javascript">
    // function sum(a,b,c){
    //     return a+b+c;
    // }
    function sum(a) {
        return(b)=>{
            return(c)=>{
                return a+b+c;
            }
        }

    }
    // const  result = sum(1,2,3)
    const result = sum(1)(2)(3)
    console.log(result);
</script>
</body>
</html>